On Mon, Oct 29, 2012 at 11:11 AM, Andreas Bießmann < andreas.de...@googlemail.com> wrote:
> Dear Dimax, > > please do not TOFU. > Sorry don't know what you mean? > > On 29.10.2012 09:50, Dimax wrote: > > Hi, > > What if I compile a new u-boot but to try it I will load and flash new > > created image after original u-boot and will run it from withing > > original reboot manually just pointing a new image address? Can it work? > I'm not going to run new-u-boot from RAM. I will flash it. Can I ask original u-boot to JMP to a flash address and run a new-u-boot from where? I once debricked SheevaPlug with USB stick. Have to recall how it was done. But as far as I remember I've found it in the internet so it should be still where. I understand that I first have to make sure I can debrick my board before I start playing with u-boot. I also want to look back at my original problem of non-recovered UBIFS. Want to make sure my effort will not be useless. Let's say I've increased the memory allocation size. But are you sure u-boot implementation of ubifs really can recover partitions just like original Linux driver does? Is it implemented at all? If yes I have another doubt. In one forum I've read that u-boot treats UBIFS partition as read only (while it actually is rw for Linux). And thus u-boot does not even try to take any action that required writes. What you think? > well, you mean to run a u-boot out of a running u-boot? > U-Boot is not designed to do so. But some devices may allow you to just > run a newer u-boot from a running one (at91;). You need to know that > u-boot set up your SDRAM timings which destroys the content of the DRAM. > So if your new u-boot is located there it can not be executed. > I dunno if the kirkwood can do so, but I think they can not. You will need > a) a JTAG > b) another boot device, for example USB, MMC, whichever device the > kirwood SoC can read from its ROM code (I do not know) > to de-brick it. > > Please ask some kirkwood specialist or google, there are a lot of > sheevaplug hackers out there, one of them may be able to help you here. > > Best regards > > Andreas Bießmann >
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